It's not my style of Karate, though, because there are several key characteristics in their style that aren't as prominent as in conventional Shotokan. They have a YouTube channel, for example, where one of their videos shows them teaching their version of Oi tzuki. Chinzo's backfoot is entirely lifted during the performance, which was a big no-no for me when I was training all the time. Keep the back foot firmly and sink your weight into the punch, we were taught. A YouTube viewer inquired about it, and their channel responded "Attacking stance is poor; back heel is up" the Machida channel says, "heel down and plant to the ground does not applicable in real life.""